I've got a brand new RedRockMicro DSLR Baseplate Assembly that I bought as an extra unit but did not end up using. Still in originally packaging, never opened. $200 - free shipping in the US lower 48.
Here is the link to the actual product: http://store.redrockmicro.com/Catalog/DSLRClamps/DSLRbaseplate
Here is the link to the actual product: http://store.redrockmicro.com/Catalog/DSLRClamps/DSLRbaseplate